Furnace radiator



Jan. 2, 1934. J- CORNWELL r AL 1,942,203

FURNACE RADiATOR Filed March 30. 1932 INVENTOR5 Tar/e J. Camwe/Z BY J0]?IRJZra/z/mdorfi ATTORNEYS Patented Jan. 2, 1934 UNITED STATES FATE?FURNACE RADIATOR Application March 30,

4 Claims.

This invention relates to improvements in furnaces, particularlyfurnaces of the hot-air type for household heating. It has for one ofits objects the provision of an improved form of radiator, mountedwithin the furnace jacket and so constructed that an increased length oftravel of the hot gases will be caused before passing to the chimney,and so arranged that the damper controlling this travel of gases will,when closed, not be subjected to the extreme heating influence of thegases to thereby become warped or twisted.

Another object of the invention is to provide in the deflectingstructure heat resisting material at the point where the hot gasesimpinge upon the deflecting member so that, this deflecting member willnot only have an increased length of life but may be readily renewedwhen desired.

Another object of the invention is to provide means for increasing thevelocity of the air from the bottom towards the top of the furnacejacket whereby increased efliciency of the furnace may be produced.

Fig. 1 is a plan view of a furnace embodying our invention, the casingbeing broken away;

Fig. 2 is a side elevation partly in section;

Fig. 3 is a horizontal section of the radiator;

Fig. 4 is a longitudinal section of the radiator; and

Fig. 5 is a perspective view of the air flues.

In the embodiment of the invention illustrated the firepot 1 may be ofany of the approved designs and this firepot near its top communicateswith the radiator 2 by means of a smoke flue 3. The radiator ispreferably arcuate in shape comprising the front and back curved plates4 and 5 connected at their ends by rounded portions 6 and this structureis covered by top and bottom plates '7 and 8. The top rear portion ofthe radiator communicates with the smoke pipe 9 leading to the chimney.In addition to this smoke flue there is also provided a secondary smokeflue 10 arranged beneath the flue 9 and communicating therewith by meansof the vertical flue 11. The smoke flue 9 has mounted therein andpreferably at a point some distance from the radiator, even to theextent of being outside of the furnace jacket a damper 12. The radiatoris divided into two passageways or branches for the passage of smoke andgases therethrough by means of a pair of walls 13 and 14. These may bemade integral with the front and back walls 4 and 5 of the radiatoralthough we prefer to form these walls 13 and 14 of castings, separatefrom the radiator, and bolt or otherwise secure the same by means oflugs 15 on the front and rear edges of the 1932. Serial No. 601,896

The bottom edges 19 of the two divider plates 13 and 14 stop short ofthe bottom of the radiator] and flue 10 communicates with the spacebetween the walls 13 and 14.

In operation when the furnace is initially fired, that is when freshcoal is thrown into the firepot, a more or less powerful draft isdesired in order to carry off the products of combustion rather quicklyand to assist in the quick ignition of the fuel. Therefore, the damper12 is opened and a direct path of travel is provided from the top of thefirepot to the chimney through the flue 3 and through the smoke flue 9.After the fuel has been fairlycwell ignited it is desirable that thecombustion. gases have a longer travel before passing into the smokeflue or chimney and therefore the damper 12 will be closed. With thedamper 12 closed the products of combustion impinging upon thefire-brick members 17 will be deflected sidewise and will pass down oneither side of the walls 13 and 14 through the flues 21 and 22 in theradiator. These products of combustion thence pass beneath the bottomedges 1 19 of the walls 13 and 14 and then upwardly through the flue 10and by means of the connection 11 into the smoke pipe and, it will benoted,

beyond the damper 12. By this increased travel there is given a greaterchance for the heat to be transmitted to the radiator and therefore intothe heating chamber of the furnace formed by the outer casing 23. Thesegases will also be given an opportunity to be thoroughly consumed beforepassing into the smoke flue or chimney.

By reason of the fact that at the point where Furthermore, it will benoted that the damper 12 is placed, when closed, out of the path oftravel of the products of combustion and hot gases so that it remainscomparatively cool and will not become collapsed or burned out by theseases.

In order to increase the radiating effect of the radiator 2, tubularpassageways, for the air to be heated, 24; and 25 are provided throughthe radiator from top to bottom whereby the cold air entering theheating chamber at the bottom and passing up through these tubularpassages becomes heated before it passes into the bonnet 26 of thefurnace casing. These flues materially increase the velocity of the airand serve to increase the bonnet pressure adding to the efficiency ofthe structure.

In addition to the above fines, we provide a plurality of air flues 2'7,on each side of the firepot, the lower ends 23 of which are above thebottom of the furnace casing and the upper ends 29 are about at thebottom of the bonnet. These flues very materially increase the'velocityof the air bonnet pressure which in turn increases the velocity of thehot air through the heat conducting flues. Furthermore by the provisionof these tubular flue members, the hot air is caused to be more rapidlypassed through the furnace casing as a result of the increased velocitytherethrough and there is less heat Wasted through the furnace casing.

We preferably so construct these tubular fiues that they constitute aunitary structure which may be readily mounted within the furnacecasing. To this end we provide a plurality of tubular structures as 27which may be made of galvanized pipe of suitable diameter and thesetubular members are connected together by means of a transverselyextending brace or connector member 30, each tube being connected to thebrace by bolts 31 or other suitable connecting device. The tubular flueadjacent the radiator 2 is provided at its upper end with a hook 32whereby it may be hung upon the upper edge of. the radiator. front endof the bracing member 30 lies adjacent the front portion of the casingat the point 33 and may be bolted or otherwise secured at this point,being preferably secured to the front casting plate 34 so that, the flueunits may be hung in position prior to the assembly of the casing.

We claim the following:

1. A radiator for hot air furnaces comprising an airtight casingincluding front and rear spaced apart walls, said front wall. near itstop having an opening connected by a smoke flue with the firepot of thefurnace, said rear wall having an opening in alignment with said frontwall opening and connected by a smoke flue. with the chimney, verticalpartitions extending between said front and backwalls to divide thecasinginto two side and a center passageways, said vertical dividingwalls at their tops ending below said openings and at their bottomsending above the bottom of the radiator, a cover for said centerpassageway inclined downwardly from back to front, from a point inalignment with the bottom of the chimney smoke flue opening, and adamper for controlling the passage of products of combustion throughsaid chimney smoke flue opening located out of the direct line ofpassageway of the products of combustion The when the damper is closed,said center passageway having an opening in the rear wall communicatingwith the chimney smoke flue.

2. A radiator for hot air furnaces comprising an air-tight casingincluding front and back spaced apart walls, said casing near its tophaving an opening in the front wall communicating with the flrepot ofthe furnace and an opening in its rear wall in alignment with said frontwall opening connected to the chimney smoke flue, vertical partitionsextending between said front and back walls to divide the easing intotwo side a and a center passageways, a closure for said centerpassageway formed of firebrick and inclined downwardly and forwardlyfrom a point approximately in line with the bottom of the chimney smokeflue, and a damper for controlling the passage of the products ofcombustion through said smoke flue opening located out of the line oftravel of the products of combustion, when the damper is closed, saidcenter passageway having an opening in the rear wall of the radiatorcommunicating with the chimney smoke flue.

3. A radiator for hot air furnaces comprising ing, and a damper locatedin the chimney smoke flue for controlling the passage of the productsof. combustion through said rear opening, said center passageway havingan opening in the rear wall of the casing-communicating with the chimneysmoke flue.

4. A radiator for hot air furnaces comprising an air tight casingincluding front and back spaced apart walls, said casing near its tophaving an opening in'its front wallcommunicating with the firepot of thefurnace and an opening in its rear wall in alignment with its front wallopening connected with the smoke flue for the chimney, verticalpartitions extending between said front and back walls to divide thecasing into two side and a center passageways, a closure for the centerpassageway comprising a cover mem' ber formed of fire brick supported onthe tops of the vertical walls and inclined downwardly from back tofront, said cover'being below the bottom of the smoke flue openings, anda damper for controlling the passageway of the products of combustionthrough said rear wall opening located in the chimney'smoke flue, saidcenter passageway having an opening in the rear wall of the casingcommunicating with the chimney smoke flue.

TURLEY J. CORNWELL. JOHN R. STRAHLENDORF.

